FoE is not becoming more complex. The endlessly increasing boosts to event building are making it more dumbed down every event. I started a new city on a new world two months ago and already have 652/585 red boosts in Iron Age. Can already fight GE5 except for last four encounters, but always have a surplus of goods to negotiate. It is not at all more complex, just way more time consuming and $$$ oriented. See QI for latest example of both traits.